My mom...... eating......................?

Start by going back to your school counselor and telling them everything that you wrote down here. They will be able to step in so you can get professional help. From what you are describing you are probably anorexic (not eating to try and lose weight and have control over some part of your life). Also being 14 means you don't have as much freedom as you would like. Please speak to either your couselor or another teacher they can help you.